water quality testing equipment
How Can I Test the Water Retention of Soil?

Hi,
I am a high school student working on a Science Fair Project regarding the usefulness of charcoal additives in soil to improve soil quality. As part of my experiment, I would like to focus on increased water retention levels of soils containing charcoal.How exactly could I test water retention with only household materials? Do I need to have a tensiometer or other advanced equipment to squeeze the water out of the soil? Any suggestions would be greatly appreciated!

A simpler and less expensive method can be used if you are consistent in timing and method. You would need screened soil (a window screen would work, or better if slightly larger) to get consistent soil size, getting rid of stones, roots or other foreign matter.

You will need enough soil to run at least duplicate samples with and without charcoal. The more replicates, the better the data will be. You will need to dry the soil (a vacuum oven is best, but you could use a household oven at 250 F for a couple of hours).

You need to determine the amount of charcoal you want to add 1%, 2%? Mix you charcoal into the soil well. For the samples weigh the container (4 ounce baby food jar?) and weigh out say 50 g of oven dried soil (with and without charcoal) into the jar and add just enough water to make a rather thick mud perhaps using a nail as a stirrer. There should be a very slight amount of water remaining on top of the mud.
Invert the jar onto 2-3 pleated coffee filters to adsorb the excess water from the jar.time how long you leave to jars (15 – 30 minutes maybe) and then re-weigh the jars.

You next need to calculate the percent of water retained for each sample. 100-(Dry soil & jar weight/wet soil & jar weight X 100) should give you the percent weight of water each soil has. For example 100- (83 g/101 g X100) = 17.8% water.

Treat each and every soil sample consistently. Hopefully you have access to a balance that can read 2 decimal places. If you have to do the work at home and take the samples to school to weigh, cap the jars to retain the moisture.

The procedure above is a bit crude to what a laboratory would do, but if you are careful you may see some results although you may have to scale up a bit. What soil type you use will greatly affect the water retention with sandy soils retaining less and clay/loam soils retaining more.

Good luck

water quality testing equipment

Ensuring Industrial Safety With Instrumentation and Test Tools

As Indian industries are basking on the newfound status of being one of the most rapidly progressive industrial super powers, there has been a remarkable demand for industrial supplies in the last couple of years. This has also spurred up the need for online industrial and business supplies stores in India.

Some of the primary tools business houses need to procure while setting up an industrial unit are the instrumentation and test tools. Although, these tools may vary according to the respective industries, however, instrumentation and test tools are indispensable before setting up any industries or business.

These instrumentation and test tools when made available from online industrial supply stores, not only saves the buyer time to go to a retail store and choose the product, but also provide value added services like product comparison and doorstep delivery. Moreover, this gives the industrial buyer access to avail quality products at reasonable rates from a wide range of products.

Industries in India has now become highly responsive on the safety and security, which has thereby raised the bar to procure high quality instrumentation and test tools like HVAC test instruments, indoor air quality and non-electric properties testing; along with pressure and vacuum measuring instruments and process monitoring tools.

Moreover, the e-commerce industrial supplies stores are also dedicatedly involved in providing high quality test tools for industries regarding temperature and humidity measuring and water quality testing. There are also constant updating of innovative products in the category of instrumentation and test tools include indoor air quality, non-electrical properties testing, pressure and vacuum measuring, among many others.

Industries nowadays, in this highly competitive market, especially in the service industry like hotels are concerned about providing safe and clean air. This apprehension about air movement in industrial and business units has created a demand for instrumentation and test tools like air balancers, air velocity indicators, air velocity monitor accessories and airflow capture hoods, etc.

Besides, due to the rapid industrial growth in automotive business and industry units, there has also been record demand for instrumentation and testing like automotive test and record instruments, battery testers, automotive testing instruments, etc. Apart from this, automotive industrial units are also making prior orders for combustion testing tools like combustion analyzers accessories and analyzers. As innovation rules the industry to create sophisticated equipments, gym scales have come a long way since it was necessary to enter your age, sex and height, every time you want to check your weight. Now, the modern gym scales like the latest from Tanita, gives you accurate readings every time you step on the scale in a single span. Moreover, gym scales nowadays are taking care about the precision, which is capable of indicating differences of up to tenths of pounds.

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Like the product, but hate the seller? Should I buy my second favorite instead?

I’m in the market for a water softener for my house. I’ve had few salespeople come home, test my water, do their usual selling stuff, and price me. All the salespeople that came here got similar results with their water testing and all of them were nice….. except for one lady…..

I have an ongoing hate relationship with B**ts the Chemist, but have found myself obliged to use them on occasion when no alternative exists or is practical. I figure that under those circumstances I’d be hurting myself much more than any minuscule damage I could do to them. An absolute boycott would, after all, be symbolic at best.

Your situation is more difficult because this person stands to benefit directly, both financially and through her sales figures, neither of which she deserves. Seems to me that you have an opportunity – if you’re prepared to stand up for yourself – to get what you want *and* avoid doing this person any favours: as others have suggested, call the company and request another representative to handle the sale. If they ask why, tell them.

Of course, this will require you to be a little confrontational, and even risk the person learning of your displeasure. And she might try to claim the sale as her own regardless. I’d assume that you’d ideally rather just avoid these people if possible. This could be a good time to call in a pushy, self-righteous, intemperate friend…

Any way out seems to be a zero-sum game. Either you: accept a lesser product; or have to confront this lousy salesperson indirectly via the company; or end up rewarding her for a job badly done. Nasty, infuriating, and all because of this wretched person!

One thing: I sincerely hope this is a ‘real’ ion-exchange water softener, and not one of those electromagnetic ones that run on gullibility and magic…

CD

Material Testing Machine, General Lab Testing

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